If you don't understand /click macros and how to "tune" them to your specific play style, I would not use them, as you'll see a net DPS loss.

Many here just cut & paste macros that have been posted by others, with absolutely no understand of the "how and why" behind what the macros does, and the reasoning the original author used to design said macro(s).

I suggest you research and build your macros from scratch that fit your specific playstyle. Don't be a lemming like the majority here. Building a good click macro takes only a few minutes and a target dummy.